<?php 
/**
 * 颜色转换和分析
 *
 * @package if
 * @subpackage module.image
 * @since 1.0
 */
class IColor extends IObject {	
	/**
	* RGB转16进制
	* 
	* @param array $color array(red, green, blue)
	* @return string 16进制颜色
	* @see hex2rgb()
	*/
	static function rgb2hex($color) {
		return "#" . sprintf("%02X%02X%02X", $color[0], $color[1], $color[2]);	
	}
	
	/**
	* 16进制转RGB
	* 
	* @param string $color 16进制颜色
	* @return array array(red, green, blue)
	* @see reg2hex()
	*/
	static function hex2rgb($color) {
		$color = ltrim($color, "#");
		if (strlen($color) == 3) {
			$color .= $color;
		}
		if (strlen($color) != 6) {
			throw new IException("invalid hex color '{$color}'", 0x100023);
		}
		return array(hexdec(substr($color, 0, 2)), hexdec(substr($color, 2, 2)), hexdec(substr($color, 4, 2)));	
	}
	
	/** 
	* 名称 - 三原色 对照表
	* 
	* 由三原色名称得知三原色
	* 
	* @param string $color 颜色名称
	* @return array 形如array(red, green, blue)
	* @access public
	*/
	static function rgb($color) {
		$array = array(
					"aqua"=> array(0, 255, 255),
					"lime"=> array(0, 255, 0),
					"teal"=> array(0, 128, 128),
					"whitesmoke"=>array(245, 245, 245),
					"gainsboro"=>array(220, 220, 220),
					"oldlace"=>array(253, 245, 230),
					"linen"=>array(250, 240, 230),
					"antiquewhite"=>array(250, 235, 215),
					"papayawhip"=>array(255, 239, 213),
					"blanchedalmond"=>array(255, 235, 205),
					"bisque"=>array(255, 228, 196),
				    "peachpuff"=>array(255, 218, 185),
				    "navajowhite"=>array(255, 222, 173),
				    "moccasin"=>array(255, 228, 181),
				    "cornsilk"=>array(255, 248, 220),
				    "ivory"=>array(255, 255, 240),
				    "lemonchiffon"=>array(255, 250, 205),
				    "seashell"=>array(255, 245, 238),
				    "mintcream"=>array(245, 255, 250),
				    "azure"=>array(240, 255, 255),
				    "aliceblue"=>array(240, 248, 255),
				    "lavender"=>array(230, 230, 250),
				    "lavenderblush"=>array(255, 240, 245),
				    "mistyrose"=>array(255, 228, 225),
				    "white"=>array(255,255,255),
				    "black"=>array(0,0,0),
				    "darkslategray"=>array(47,79,79),
				    "dimgray"=>array(105,105,105),
				    "slategray"=>array(112,128,144),
				    "lightslategray"=>array(119,136,153),
				    "gray"=>array(190,190,190),
				    "lightgray"=>array(211, 211,211),
				    "midnightblue"=>array(25, 25,112),
				    "navy"=>array(0, 0,128),
				    "cornflowerblue"=>array(100, 149, 237), 
				    "darkslateblue"=>array(72, 61, 139), 
				    "slateblue"=>array(106, 90, 205), 
				    "mediumslateblue"=>array(123, 104, 238), 
				    "lightslateblue"=>array(132, 112, 255), 
				    "mediumblue"=>array(0, 0, 205), 
				    "royalblue"=>array(65, 105, 225), 
				    "blue"=>array(0, 0, 255), 
				    "dodgerblue"=>array(30, 144, 255), 
				    "deepskyblue"=>array(0, 191, 255), 
				    "skyblue"=>array(135, 206, 235), 
				    "lightskyblue"=>array(135, 206, 250), 
				    "steelblue"=>array(70, 130, 180), 
				    "lightred"=>array(211, 167, 168), 
				    "lightsteelblue"=>array(176, 196, 222), 
				    "lightblue"=>array(173, 216, 230), 
				    "powderblue"=>array(176, 224, 230), 
				    "paleturquoise"=>array(175, 238, 238), 
				    "darkturquoise"=>array(0, 206, 209), 
				    "mediumturquoise"=>array(72, 209, 204), 
				    "turquoise"=>array(64, 224, 208), 
				    "cyan"=>array(0, 255, 255), 
				    "lightcyan"=>array(224, 255, 255), 
				    "cadetblue"=>array(95, 158, 160), 
				    "mediumaquamarine"=>array(102, 205, 170), 
				    "aquamarine"=>array(127, 255, 212), 
				    "darkgreen"=>array(0, 100, 0), 
				    "darkolivegreen"=>array(85, 107, 47), 
				    "darkseagreen"=>array(143, 188, 143), 
				    "seagreen"=>array(46, 139, 87), 
				    "mediumseagreen"=>array(60, 179, 113), 
				    "lightseagreen"=>array(32, 178, 170), 
				    "palegreen"=>array(152, 251, 152), 
				    "springgreen"=>array(0, 255, 127), 
				    "lawngreen"=>array(124, 252, 0), 
				    "green" => array(0,  255,  0), 
				    "chartreuse"=>array(127, 255, 0), 
				    "mediumspringgreen"=>array(0, 250, 154), 
				    "greenyellow"=>array(173, 255, 47), 
				    "limegreen"=>array(50, 205, 50), 
				    "yellowgreen"=>array(154, 205, 50), 
				    "forestgreen"=>array(34, 139, 34), 
				    "olivedrab"=>array(107, 142, 35), 
				    "darkkhaki"=>array(189, 183, 107), 
				    "khaki"=>array(240, 230, 140), 
				    "palegoldenrod"=>array(238, 232, 170), 
				    "lightgoldenrodyellow"=>array(250, 250, 210), 
				    "lightyellow"=>array(255, 255, 200), 
				    "yellow"=>array(255, 255, 0), 
				    "gold"=>array(255, 215, 0), 
				    "lightgoldenrod"=>array(238, 221, 130), 
				    "goldenrod"=>array(218, 165, 32), 
				    "darkgoldenrod"=>array(184, 134, 11), 
				    "rosybrown"=>array(188, 143, 143), 
				    "indianred"=>array(205, 92, 92), 
				    "saddlebrown"=>array(139, 69, 19), 
				    "sienna"=>array(160, 82, 45), 
				    "peru"=>array(205, 133, 63), 
				    "burlywood"=>array(222, 184, 135), 
				    "beige"=>array(245, 245, 220), 
				    "wheat"=>array(245, 222, 179), 
				    "sandybrown"=>array(244, 164, 96), 
				    "tan"=>array(210, 180, 140), 
				    "chocolate"=>array(210, 105, 30), 
				    "firebrick"=>array(178, 34, 34), 
				    "brown"=>array(165, 42, 42), 
				    "darksalmon"=>array(233, 150, 122), 
				    "salmon"=>array(250, 128, 114), 
				    "lightsalmon"=>array(255, 160, 122), 
				    "orange"=>array(255, 165, 0), 
				    "darkorange"=>array(255, 140, 0), 
				    "coral"=>array(255, 127, 80), 
				    "lightcoral"=>array(240, 128, 128), 
				    "tomato"=>array(255, 99, 71), 
				    "orangered"=>array(255, 69, 0), 
				    "red"=>array(255, 0, 0), 
				    "hotpink"=>array(255, 105, 180), 
				    "deeppink"=>array(255, 20, 147), 
				    "pink"=>array(255, 192, 203), 
				    "lightpink"=>array(255, 182, 193), 
				    "palevioletred"=>array(219, 112, 147), 
				    "maroon"=>array(176, 48, 96), 
				    "mediumvioletred"=>array(199, 21, 133), 
				    "violetred"=>array(208, 32, 144), 
				    "magenta"=>array(255, 0, 255), 
				    "violet"=>array(238, 130, 238), 
				    "plum"=>array(221, 160, 221), 
				    "orchid"=>array(218, 112, 214), 
				    "mediumorchid"=>array(186, 85, 211), 
				    "darkorchid"=>array(153, 50, 204), 
				    "darkviolet"=>array(148, 0, 211), 
				    "blueviolet"=>array(138, 43, 226), 
				    "purple"=>array(160, 32, 240), 
				    "mediumpurple"=>array(147, 112, 219), 
				    "thistle"=>array(216, 191, 216), 
				    "snow1"=>array(255, 250, 250), 
				    "snow2"=>array(238, 233, 233), 
				    "snow3"=>array(205, 201, 201), 
				    "snow4"=>array(139, 137, 137), 
				    "seashell1"=>array(255, 245, 238), 
				    "seashell2"=>array(238, 229, 222), 
				    "seashell3"=>array(205, 197, 191), 
				    "seashell4"=>array(139, 134, 130), 
				    "AntiqueWhite1"=>array(255, 239, 219), 
				    "AntiqueWhite2"=>array(238, 223, 204), 
				    "AntiqueWhite3"=>array(205, 192, 176), 
				    "AntiqueWhite4"=>array(139, 131, 120), 
				    "bisque1"=>array(255, 228, 196), 
				    "bisque2"=>array(238, 213, 183), 
				    "bisque3"=>array(205, 183, 158), 
				    "bisque4"=>array(139, 125, 107), 
				    "peachPuff1"=>array(255, 218, 185), 
				    "peachpuff2"=>array(238, 203, 173), 
				    "peachpuff3"=>array(205, 175, 149), 
				    "peachpuff4"=>array(139, 119, 101), 
				    "navajowhite1"=>array(255, 222, 173), 
				    "navajowhite2"=>array(238, 207, 161), 
				    "navajowhite3"=>array(205, 179, 139), 
				    "navajowhite4"=>array(139, 121, 94), 
				    "lemonchiffon1"=>array(255, 250, 205), 
				    "lemonchiffon2"=>array(238, 233, 191), 
				    "lemonchiffon3"=>array(205, 201, 165), 
				    "lemonchiffon4"=>array(139, 137, 112), 
				    "ivory1"=>array(255, 255, 240), 
				    "ivory2"=>array(238, 238, 224), 
				    "ivory3"=>array(205, 205, 193), 
				    "ivory4"=>array(139, 139, 131), 
				    "honeydew"=>array(193, 205, 193), 
				    "lavenderblush1"=>array(255, 240, 245), 
				    "lavenderblush2"=>array(238, 224, 229), 
				    "lavenderblush3"=>array(205, 193, 197), 
				    "lavenderblush4"=>array(139, 131, 134), 
				    "mistyrose1"=>array(255, 228, 225), 
				    "mistyrose2"=>array(238, 213, 210), 
				    "mistyrose3"=>array(205, 183, 181), 
				    "mistyrose4"=>array(139, 125, 123), 
				    "azure1"=>array(240, 255, 255), 
				    "azure2"=>array(224, 238, 238), 
				    "azure3"=>array(193, 205, 205), 
				    "azure4"=>array(131, 139, 139), 
				    "slateblue1"=>array(131, 111, 255), 
				    "slateblue2"=>array(122, 103, 238), 
				    "slateblue3"=>array(105, 89, 205), 
				    "slateblue4"=>array(71, 60, 139), 
				    "royalblue1"=>array(72, 118, 255), 
				    "royalblue2"=>array(67, 110, 238), 
				    "royalblue3"=>array(58, 95, 205), 
				    "royalblue4"=>array(39, 64, 139), 
				    "dodgerblue1"=>array(30, 144, 255), 
				    "dodgerblue2"=>array(28, 134, 238), 
				    "dodgerblue3"=>array(24, 116, 205), 
				    "dodgerblue4"=>array(16, 78, 139), 
				    "steelblue1"=>array(99, 184, 255), 
				    "steelblue2"=>array(92, 172, 238), 
				    "steelblue3"=>array(79, 148, 205), 
				    "steelblue4"=>array(54, 100, 139), 
				    "deepskyblue1"=>array(0, 191, 255), 
				    "deepskyblue2"=>array(0, 178, 238), 
				    "deepskyblue3"=>array(0, 154, 205), 
				    "deepskyblue4"=>array(0, 104, 139), 
				    "skyblue1"=>array(135, 206, 255), 
				    "skyblue2"=>array(126, 192, 238), 
				    "skyblue3"=>array(108, 166, 205), 
				    "skyblue4"=>array(74, 112, 139), 
				    "lightskyblue1"=>array(176, 226, 255), 
				    "lightskyblue2"=>array(164, 211, 238), 
				    "lightskyblue3"=>array(141, 182, 205), 
				    "lightskyblue4"=>array(96, 123, 139), 
				    "slategray1"=>array(198, 226, 255), 
				    "slategray2"=>array(185, 211, 238), 
				    "slategray3"=>array(159, 182, 205), 
				    "slategray4"=>array(108, 123, 139), 
				    "lightsteelblue1"=>array(202, 225, 255), 
				    "lightsteelblue2"=>array(188, 210, 238), 
				    "lightsteelblue3"=>array(162, 181, 205), 
				    "lightsteelblue4"=>array(110, 123, 139), 
				    "lightblue1"=>array(191, 239, 255), 
				    "lightblue2"=>array(178, 223, 238), 
				    "lightblue3"=>array(154, 192, 205), 
				    "lightblue4"=>array(104, 131, 139), 
				    "lightcyan1"=>array(224, 255, 255), 
				    "lightcyan2"=>array(209, 238, 238), 
				    "lightcyan3"=>array(180, 205, 205), 
				    "lightcyan4"=>array(122, 139, 139), 
				    "paleturquoise1"=>array(187, 255, 255), 
				    "paleturquoise2"=>array(174, 238, 238), 
				    "paleturquoise3"=>array(150, 205, 205), 
				    "paleturquoise4"=>array(102, 139, 139), 
				    "cadetblue1"=>array(152, 245, 255), 
				    "cadetblue2"=>array(142, 229, 238), 
				    "cadetblue3"=>array(122, 197, 205), 
				    "cadetblue4"=>array(83, 134, 139), 
				    "turquoise1"=>array(0, 245, 255), 
				    "turquoise2"=>array(0, 229, 238), 
				    "turquoise3"=>array(0, 197, 205), 
				    "turquoise4"=>array(0, 134, 139), 
				    "cyan1"=>array(0, 255, 255), 
				    "cyan2"=>array(0, 238, 238), 
				    "cyan3"=>array(0, 205, 205), 
				    "cyan4"=>array(0, 139, 139), 
				    "darkslategray1"=>array(151, 255, 255), 
				    "darkslategray2"=>array(141, 238, 238), 
				    "darkslategray3"=>array(121, 205, 205), 
				    "darkslategray4"=>array(82, 139, 139), 
				    "aquamarine1"=>array(127, 255, 212), 
				    "aquamarine2"=>array(118, 238, 198), 
				    "aquamarine3"=>array(102, 205, 170), 
				    "aquamarine4"=>array(69, 139, 116), 
				    "darkseagreen1"=>array(193, 255, 193), 
				    "darkseagreen2"=>array(180, 238, 180), 
				    "darkseagreen3"=>array(155, 205, 155), 
				    "darkseagreen4"=>array(105, 139, 105), 
				    "seagreen1"=>array(84, 255, 159), 
				    "seagreen2"=>array(78, 238, 148), 
				    "seagreen3"=>array(67, 205, 128), 
				    "seagreen4"=>array(46, 139, 87), 
				    "palegreen1"=>array(154, 255, 154), 
				    "palegreen2"=>array(144, 238, 144), 
				    "palegreen3"=>array(124, 205, 124), 
				    "palegreen4"=>array(84, 139, 84), 
				    "springgreen1"=>array(0, 255, 127), 
				    "springgreen2"=>array(0, 238, 118), 
				    "springgreen3"=>array(0, 205, 102), 
				    "springgreen4"=>array(0, 139, 69), 
				    "chartreuse1"=>array(127, 255, 0), 
				    "chartreuse2"=>array(118, 238, 0), 
				    "chartreuse3"=>array(102, 205, 0), 
				    "chartreuse4"=>array(69, 139, 0), 
				    "olivedrab1"=>array(192, 255, 62), 
				    "olivedrab2"=>array(179, 238, 58), 
				    "olivedrab3"=>array(154, 205, 50), 
				    "olivedrab4"=>array(105, 139, 34), 
				    "darkolivegreen1"=>array(202, 255, 112), 
				    "darkolivegreen2"=>array(188, 238, 104), 
				    "darkolivegreen3"=>array(162, 205, 90), 
				    "darkolivegreen4"=>array(110, 139, 61), 
				    "khaki1"=>array(255, 246, 143), 
				    "khaki2"=>array(238, 230, 133), 
				    "khaki3"=>array(205, 198, 115), 
				    "khaki4"=>array(139, 134, 78), 
				    "lightgoldenrod1"=>array(255, 236, 139), 
				    "lightgoldenrod2"=>array(238, 220, 130), 
				    "lightgoldenrod3"=>array(205, 190, 112), 
				    "lightgoldenrod4"=>array(139, 129, 76), 
				    "yellow1"=>array(255, 255, 0), 
				    "yellow2"=>array(238, 238, 0), 
				    "yellow3"=>array(205, 205, 0), 
				    "yellow4"=>array(139, 139, 0), 
				    "gold1"=>array(255, 215, 0), 
				    "gold2"=>array(238, 201, 0), 
				    "gold3"=>array(205, 173, 0), 
				    "gold4"=>array(139, 117, 0), 
				    "goldenrod1"=>array(255, 193, 37), 
				    "goldenrod2"=>array(238, 180, 34), 
				    "goldenrod3"=>array(205, 155, 29), 
				    "goldenrod4"=>array(139, 105, 20), 
				    "darkgoldenrod1"=>array(255, 185, 15), 
				    "darkgoldenrod2"=>array(238, 173, 14), 
				    "darkgoldenrod3"=>array(205, 149, 12), 
				    "darkgoldenrod4"=>array(139, 101, 8), 
				    "rosybrown1"=>array(255, 193, 193), 
				    "rosybrown2"=>array(238, 180, 180), 
				    "rosybrown3"=>array(205, 155, 155), 
				    "rosybrown4"=>array(139, 105, 105), 
				    "indianred1"=>array(255, 106, 106), 
				    "indianred2"=>array(238, 99, 99), 
				    "indianred3"=>array(205, 85, 85), 
				    "indianred4"=>array(139, 58, 58), 
				    "sienna1"=>array(255, 130, 71), 
				    "sienna2"=>array(238, 121, 66), 
				    "sienna3"=>array(205, 104, 57), 
				    "sienna4"=>array(139, 71, 38), 
				    "burlywood1"=>array(255, 211, 155), 
				    "burlywood2"=>array(238, 197, 145), 
				    "burlywood3"=>array(205, 170, 125), 
				    "burlywood4"=>array(139, 115, 85), 
				    "wheat1"=>array(255, 231, 186), 
				    "wheat2"=>array(238, 216, 174), 
				    "wheat3"=>array(205, 186, 150), 
				    "wheat4"=>array(139, 126, 102), 
				    "tan1"=>array(255, 165, 79), 
				    "tan2"=>array(238, 154, 73), 
				    "tan3"=>array(205, 133, 63), 
				    "tan4"=>array(139, 90, 43), 
				    "chocolate1"=>array(255, 127, 36), 
				    "chocolate2"=>array(238, 118, 33), 
				    "chocolate3"=>array(205, 102, 29), 
				    "chocolate4"=>array(139, 69, 19), 
				    "firebrick1"=>array(255, 48, 48), 
				    "firebrick2"=>array(238, 44, 44), 
				    "firebrick3"=>array(205, 38, 38), 
				    "firebrick4"=>array(139, 26, 26), 
				    "brown1"=>array(255, 64, 64), 
				    "brown2"=>array(238, 59, 59), 
				    "brown3"=>array(205, 51, 51), 
				    "brown4"=>array(139, 35, 35), 
				    "salmon1"=>array(255, 140, 105), 
				    "salmon2"=>array(238, 130, 98), 
				    "salmon3"=>array(205, 112, 84), 
				    "salmon4"=>array(139, 76, 57), 
				    "lightsalmon1"=>array(255, 160, 122), 
				    "lightsalmon2"=>array(238, 149, 114), 
				    "lightsalmon3"=>array(205, 129, 98), 
				    "lightsalmon4"=>array(139, 87, 66), 
				    "orange1"=>array(255, 165, 0), 
				    "orange2"=>array(238, 154, 0), 
				    "orange3"=>array(205, 133, 0), 
				    "orange4"=>array(139, 90, 0), 
				    "darkorange1"=>array(255, 127, 0), 
				    "darkorange2"=>array(238, 118, 0), 
				    "darkorange3"=>array(205, 102, 0), 
				    "darkorange4"=>array(139, 69, 0), 
				    "coral1"=>array(255, 114, 86), 
				    "coral2"=>array(238, 106, 80), 
				    "coral3"=>array(205, 91, 69), 
				    "coral4"=>array(139, 62, 47), 
				    "tomato1"=>array(255, 99, 71), 
				    "tomato2"=>array(238, 92, 66), 
				    "tomato3"=>array(205, 79, 57), 
				    "tomato4"=>array(139, 54, 38), 
				    "orangered1"=>array(255, 69, 0), 
				    "orangered2"=>array(238, 64, 0), 
				    "orangered3"=>array(205, 55, 0), 
				    "orangered4"=>array(139, 37, 0), 
				    "deeppink1"=>array(255, 20, 147), 
				    "deeppink2"=>array(238, 18, 137), 
				    "deeppink3"=>array(205, 16, 118), 
				    "deeppink4"=>array(139, 10, 80), 
				    "hotpink1"=>array(255, 110, 180), 
				    "hotpink2"=>array(238, 106, 167), 
				    "hotpink3"=>array(205, 96, 144), 
				    "hotpink4"=>array(139, 58, 98), 
				    "pink1"=>array(255, 181, 197), 
				    "pink2"=>array(238, 169, 184), 
				    "pink3"=>array(205, 145, 158), 
				    "pink4"=>array(139, 99, 108), 
				    "lightpink1"=>array(255, 174, 185), 
				    "lightpink2"=>array(238, 162, 173), 
				    "lightpink3"=>array(205, 140, 149), 
				    "lightpink4"=>array(139, 95, 101), 
				    "palevioletred1"=>array(255, 130, 171), 
				    "palevioletred2"=>array(238, 121, 159), 
				    "palevioletred3"=>array(205, 104, 137), 
				    "palevioletred4"=>array(139, 71, 93), 
				    "maroon1"=>array(255, 52, 179), 
				    "maroon2"=>array(238, 48, 167), 
				    "maroon3"=>array(205, 41, 144), 
				    "maroon4"=>array(139, 28, 98), 
				    "violetred1"=>array(255, 62, 150), 
				    "violetred2"=>array(238, 58, 140), 
				    "violetred3"=>array(205, 50, 120), 
				    "violetred4"=>array(139, 34, 82), 
				    "magenta1"=>array(255, 0, 255), 
				    "magenta2"=>array(238, 0, 238), 
				    "magenta3"=>array(205, 0, 205), 
				    "magenta4"=>array(139, 0, 139), 
				    "mediumred"=>array(140, 34, 34),         
				    "orchid1"=>array(255, 131, 250), 
				    "orchid2"=>array(238, 122, 233), 
				    "orchid3"=>array(205, 105, 201), 
				    "orchid4"=>array(139, 71, 137), 
				    "plum1"=>array(255, 187, 255), 
				    "plum2"=>array(238, 174, 238), 
				    "plum3"=>array(205, 150, 205), 
				    "plum4"=>array(139, 102, 139), 
				    "mediumorchid1"=>array(224, 102, 255), 
				    "mediumorchid2"=>array(209, 95, 238), 
				    "mediumorchid3"=>array(180, 82, 205), 
				    "mediumorchid4"=>array(122, 55, 139), 
				    "darkorchid1"=>array(191, 62, 255), 
				    "darkorchid2"=>array(178, 58, 238), 
				    "darkorchid3"=>array(154, 50, 205), 
				    "darkorchid4"=>array(104, 34, 139), 
				    "purple1"=>array(155, 48, 255), 
				    "purple2"=>array(145, 44, 238), 
				    "purple3"=>array(125, 38, 205), 
				    "purple4"=>array(85, 26, 139), 
				    "mediumpurple1"=>array(171, 130, 255), 
				    "mediumpurple2"=>array(159, 121, 238), 
				    "mediumpurple3"=>array(137, 104, 205), 
				    "mediumpurple4"=>array(93, 71, 139), 
				    "thistle1"=>array(255, 225, 255), 
				    "thistle2"=>array(238, 210, 238), 
				    "thistle3"=>array(205, 181, 205), 
				    "thistle4"=>array(139, 123, 139), 
				    "gray1"=>array(10, 10, 10), 
				    "gray2"=>array(40, 40, 30), 
				    "gray3"=>array(70, 70, 70), 
				    "gray4"=>array(100, 100, 100), 
				    "gray5"=>array(130, 130, 130), 
				    "gray6"=>array(160, 160, 160), 
				    "gray7"=>array(190, 190, 190), 
				    "gray8"=>array(210, 210, 210), 
				    "gray9"=>array(240, 240, 240), 
				    "darkgray"=>array(100, 100, 100), 
				    "darkblue"=>array(0, 0, 139), 
				    "darkcyan"=>array(0, 139, 139), 
				    "darkmagenta"=>array(139, 0, 139), 
				    "darkred"=>array(139, 0, 0), 
				    "silver"=>array(192,  192,  192), 
				    "eggplant"=>array(144, 176, 168), 
				    "lightgreen"=>array(144, 238, 144)
				);	
		$color = strtolower($color);
		if (!isset($array[$color])) {
			return array();	
		}
		return $array[$color];
	}	
		
}

?>